DevTools: Reformat TimelineUIUtils strings.
DevTools: Reformat TimelineUIUtils strings.

Change-Id: I41534e7523fe04c07051da087c9c5b19b332de15
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1572269
Reviewed-by: Dmitry Gozman <0ca14b32cbb359a30ac562af27dd84cc2813eacb@chromium.org>
Commit-Queue: Alexei Filippov <52e51c43e283548b762e3c9dd9a4600768db9fb4@chromium.org>
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#651827}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 076fb9e161568fa524f7c65c3f3c83abf9337f14
ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend